Improvement in rotary condensing steam-pumps



W. B. S1. E. STTT. Rntaryqundensifng Steam-Pumps- .N0.154,100.

` Patented Aug. 11,1874.

THE HAN'HC CU. PHOTO-LITNJSI: 4l PARK PLACE'NJ',

UNITED STATES PATENT OFFICE.

WILLIAM B. S'IOTT AND ELLIS STOTT, OF SCRANTON, PENNSYLVANIA.

IMPRovEMENT IN RoTARv co'NnENslNG STEAM-PUMPS.

Specification forming part of LettersPatent No. 154,100, datedAugust 11, 1874; application filed June 3, 1874.

To Aall whom t may concern:

Be it known that we, WILLIAM B. STOTT and-ELLIS STOTT, of Scranton, in the county of LuzerneI and State of Pennsylvania, have invented-a new and Improved Rotary Condensing Steam-Pump; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being hadto the accompanying drawings forming part of v this specification, in which- Figure l isa vertical longitudinal section of our improved rotary condensing steam-pump. Fig.2 is aside elevation of one of theheads of our rotary pump, showing the cam-groove, in which one set of the rollers of the pistons are guided. l Fig. 3 is detached view of the abutment and its packing and cavity,^and Fig. 4 is a similar view of one ofthe valves. Fig.

5 is a longitudinal central section through one of the valves or pistons, showing the transverse tubes and air-spaces located in the valves.

Similar letters of reference in the accompanying drawings denote the same parts.v Our invention relates to improvements in rotary condensing steam-pumps having a sin- .gle cylinder; and consists, first, in the, em-

ployment in this class of rotary pumps of steamas the motive power to drive the revolving drum carrying the valves or pistons, the same steam also being in our construction condensed f to form a vacuum, and thereby 'raise water in the pump-cylinder.` Our invention also consists in providing the sliding valvespor pistons with transverse tubes extending through them for the passage of steam toftherear faces of the valves' to equalize the pressure on their front and rear faces, and alsowith an interior air-cavity, as hereinafter more fully set forth. Our invention also-consists in` an improved packing for the abutment, as Ahereinafter more fully set forth. Our invention further consists in the employment of a tube provided with a valve, and extending from the lower end of the eduction-pipe to the upper end of the induction-pipe, by means of which the pump may be primed from the eduction-pipe, if necessary. Our invention also consists in the employment of a steam-pipe provided with a valve, and connecting the induction-pipe with the steam-space in the outer cylinder, by means of which the water in the induction-pipe is forced upward by the steam, as hereinafter more fully set forth.

In the accompanying drawings, a is the outer cylinder or shell of our rotary condensing steam-pump bsupported by the horizontal shaft b, to which is secured the drum c, provided with flanges ff fltting steam-tight in the cylinder, and radial recesses e e for the reception of the valves or pistons d d, which are made Fto slide therein in the revolution of the drum, the rollers r r on the ends of the sliding valves d d operating in the cam-grooves g g made in the pump-heads. his an abutment attached to the upper part of the inner face ot' the shell, and provided with passages c' 'i2 for the introduction'of steam through the pipe K, andthe eduction of water through the pipe l. The outer faces of the sliding valves d d are provided with recesses for the reception of bearing-blocks m m, which are adjustably at tached to the'valves in said recesses by screws s s, the shanks of which are surrounded by coiled springs s' s', the tension of which is constantly exerted to force the bearing-blocks m m outwardly and radially against the inner face of the outer cylinder to preserve a .water and steam tight joint in the revolution of the drum. The upper faces of the bearing-blocks m m are perforated, the perforations extending transversely and entirely through the valves, and tubes are inserted in the perforations in the valves for the passage of steam or water to their rear faces to equalize the pressure on the outer and inner faces of the valves, and thereby prevent binding and reducing the friction of the rollers r r on the valves with the cam-grooves g g in the pump-heads. The sliding valves are made hollow in the interior, the object of such construction being to leave a stratum of air between the faces of the valves, which, being a poorer conductor than metal, will prevent the rapidcooling or heating of the valves from -the water and steam in contact with thein.- A similar cavity or space is made inthe fabutment h for the reception of air to prevent `the rapid heating and cooling ofthe metalof fwhich the abutment is oonstructed by` reason of the steam and water brought in contact with it in the operation of the pump. The abutment h l1J is designed to t steam-tight between the flanges ff of the drum C, and is provided with recesses in its longitudinal faces for the reception of 'the' former opening into the steam and water pas sages t' 2 in the abutments.

By this construction the pressure of the steam or water on the ends of the pins p p will be constantly exerted to press the packing laterally, and thus always preserve a tight joint between the abutment and the flanges f f, of the drum d.

a1 is a tube or water pipe leading from the lower end of the eduction-pipe Z to the induction-pipe o2, and a2 is a steam-pipe'situated on they opposite side ofthe outer cylinder, and connecting the steam-space of the latter with the water-induction pipe o2. The pipes alaz are provided with .cocks or valves c v1, and the steam-pipe a2 is bent upwardly at its lower end after it enters the induction-pipe o2, to act with more effect on the water in the latter. 'U2 'v3 are valves inthe induction and eduction pipes, both opening upward. c2 c2 are cavities inthe inner faces ofthe pump-heads, having passages connecting them provided with cocks to discharge the water contained therein. 03 is a cavity in the upper part of the inner face of the outer cylinder, which forms a communieating passage between the spaces 'on each side of the sliding valves. They pass over the cavity in the revolutions of the drum c, and atthe same time permit a portion of the water in rear of the valve to pass from behind it through the transverse tubes to their front faces, thus equalizing the pressure on the front and lrear faces of the valves.

The operation of our pump is as follows: Steam is admitted through Vthe steam-pipe K into the interior of the outer cylinder, the pump having been previously primed in the ordinary manner, or by turning the valve QJ and allowing water topass through the pipe al. The steam operates on the sliding valve nearest its point of admission, as shown by thearrow, and gives a rotary motion to the drum ci After the 'valve rst acted upon passes the steam-pipe a2, a portion of the steam is forced into said pipe, and thence into the induction-pipe o2, forcing the water up the latter, and into thesteam-space s2 in the outer cylinder. That portion of the steam not forced into the pipe a2 is condensed when it comes in contact with the water. with which the pump is primed, forming a vacuum, and the further elevation of water in the induction-pipe, which is carried by the valves upward and out of the pump through the eduction-pipe l.v When the valves are passing the abutment, the pressure of the steam on the outer faces of the valves is considerable, but it is equalized in our construction by reason of the passage vof the `steam throughthe transverse tubes in the valves to the rear faces of the latter. After the valve has reached the induction-port and is carrying water, the latter is introduced in a similar manner to the steam, before described, through the tubes to the rear face of the valve. When the valve reaches the cavity c3 in the cylinder, a communicating passage at the outer end of the valve is made between the water-spaces on each side of it, thus relieving the valve from thepressure of water on its face, which is borne by the valve succeedin g it. Any water remaining behind the sliding valves falls by gravitv into the cavity c2, when the valves arrive opposite the center of the abutment, the water passing from the Acavity out of the pump through the passage above described.

It will be seen from our construction that. steam is employed as the motive power to. drive the pump, and also by the condensation of the same steam avvacuum is produced to elevate water' inthe induction-pipe, and by. the continued rotation of the valves the water is carried out through the eduction-pipe.

We claim as our invention- 1. The combination of the single cylinder a, cylinder c, having valves d, the steam-induction pipe K, and water-pipes o2 and l, substantially as described, and for the purpose set forth. p

2. The valve d, provided with an interior air-cavity and transverse tubes, as and for the purposes set forth. l 3. The valve d sliding in recesses in the drum c, and provided with transverse tubes,

in combination with the cavities c2, as and for the purposes set forth. g Y

4. In a rotary engine the water-pipe a1, provided with a valve, in combination. with the water-eductionjpipe L andvinduction-pipe o2, substantially as described, and for the purpose set forth.

5. The steam-pipe a?, provided with a valve and bent upward at its lower end, in combination with the cylinder a and water-pipe o2, substantially as described, andfor the purpose set forth.

6. The abutment h, provided with steam and water passagest t2, and longitudinal rccesses, in combination with the packing p p, having pins p p attached thereto, and drum c provided with flanges f f, substantially as described. d

7. The outer cylinder a, provided with the steam and water pipes K l 02, in combination with the drum c having valves d d, as set forth, and steam and water pipes al a2, the whole constructed, arranged, and operated in the manner and for the purpose set forth.

WM. B. STOTT. ELLIS STOTT.

Witnesses:

DUNCAN WRIGHT, A. C. FERRER. 

